单项选择题If organelles can proliferate in response to increased demand, one could expect to find far more ____ in the liver cells of an alcoholic than in a non-drinker. A、rough ER B、smooth ER C、mitochondria D、lysosomes E、ribosomes
单项选择题DNA甲基化修饰可以长时程影响基因转录，在发育和疾病中具有特殊作用。（ ）
